Make the comment in i386/include/ucontext.h identical to the one in amd64/include/ucontext.h. The later is better worded.
Make the comment in i386/include/ucontext.h identical to the one in
amd64/include/ucontext.h. The later is better worded.

Requested by:	deischen
MFC after:	3 days

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase